Big East Middle Distance Triathlon
Sun 21 Sep 2025 Maldon, Essex, UK

ATW Big East & Maldon Triathlon | Big East Middle Distance Triathlon

The Big East and Maldon Triathlon is brought to you by the largest triathlon organiser in the UK! A great experience featuring a tidal river swim.

  • Sun 21 Sep 2025
Promenade Park, Maldon

Big East Middle Distance Triathlon

12:10

Age 18 & over on 31 Dec 2025

£155-£175

  • 1500 m river swimming
  • 86 km road cycling
  • 20 km trail running

Event overview

The race starts in the afternoon, so athletes are encouraged to stay behind and socialise with fellow athletes!

In order to time the start with the high tide, the race will begin in the afternoon.

Due to the tidal flow, the swim leg has a strict cut off time of 1hr 10 mins, and the overall event a cut off of 8.5hrs to ensure everyone finishes in daylight.

The swim uses a 750m swim course (new for 2023), starting next to the imposing statue of Byrhtnoth, celebrating the Saxon Battle of Maldon, and heads out towards Northey Island.

This event has a non-draft legal bike leg that takes athletes out of Maldon and onto the quiet, scenic roads of the Dengie Peninsula through the villages of Latchingdon, Tillingham, Steeple and Mayland. 

The run course is a flat 5km loop that heads out and back on the promenade before taking the footpath along the sea wall, and heading back towards race HQ. The last kilometre is completed looping around Promenade Park where spectators will get a great chance to cheer you on. The surface is a mixture of paved roads, grass and gravel track.

Not only will you earn yourself this fabulous medal,  there will also be goodies waiting for you at the finish line!         

This event is part of ATW Big East & Maldon Triathlon.

  • All fitness levels
  • Event village
  • Newcomers
  • Swim hat required
  • Teams
  • Wetsuit advised
  • Wetsuit not allowed if too hot
  • Wetsuit required if too cold

Transgender athletes

Transgender athletes are, and will continue to be, very welcome at this recreational and competitive triathlon activity.

At any competitive event from 1st January 2023, there will be a Female category open to athletes who are the female sex at birth and an Open category open to all other athletes.

  • Paid parking
  • Park

Event HQ

Promenade Park
Park Drive
Maldon
Essex
CM9 5JQ
UK

  • Cut off time
  • First aid
  • Marshals
  • Undulating
  • Water stations
  • Way markers

In order to time the start with the high tide, the race will begin in the afternoon at 12:10pm with registration opening at 10:30am.

Due to the tidal flow, the swim leg has a strict cut off time of 1hr 10 mins, and the overall event a cut off of 8.5hrs to ensure everyone finishes in daylight.

The swim uses a 750m swim course (that was new for 2023), starting next to the imposing statue of Byrhtnoth, celebrating the Saxon Battle of Maldon, and heads out towards Northey Island.

This event has a non-draft legal bike leg that takes athletes out of Maldon and onto the quiet, scenic roads of the Dengie Peninsula through the villages of Latchingdon, Tillingham, Steeple and Mayland. 

The run course is a flat 5km loop that heads out and back on the promenade before taking the footpath along the sea wall, and heading back towards race HQ. The last kilometre is completed looping around Promenade Park where spectators will get a great chance to cheer you on.  The surface is a mixture of paved roads, grass and gravel track.

  • Goody bag
  • Medal

Included

Finishers will receive:

  • Custom designed medal
  • Finish line snacks and goodies
  • Fantastic multi-sports experience

Optional extras

  • British Triathlon Federation Race Pass (Β£8)
  • ICE band (Β£22.94)
  • Personalised medal insert (Β£9)

  • Age 18 & over on 31 Dec 2025
  • Entries open
  • Enter online

Entry fees

Early bird entry fee

£155.00

Team entry fee

£175.00

The swim in the river Blackwater is tidal so always a bit of a challenge in one direction but usually has a nice current assistance in the other. The buoyancy of the salt water is always welcome too! Roslyn M

Superb event. So Unique with a super fast bike course. The swim was total chaos but I loved it :-) great event location, superb event and awesome medal. Nathan

My first ever triathlon and it was such a fun experience. I feel so lucky to have been able to be a part of such a well organized event and because of that I will absolutely be competing in more triathlons! Mitchell T

Lovely races here. The shallow muddy estuary start is a hoot. Salty water is really warm. Anthony G

Great event in a location that was also fantastic for supporters. Really enjoyable Swim/Bike/Run/sections with superb marshals. Justin M

Was such a nice friendly local event I’ll be back next year for sure! Charlotte L

parking is right next to the transition and registration area making it stress free to get your number pack and rack the bike. The race itself was great fun, swimming in an estuary was something a bit different Neill W

Reviews thanks to RaceCheck

Other races at event

  • Sun 21 Sep 2025
  • #1 of 5
Promenade Park, Maldon

Sprint Triathlon

12:15

Age 15 & over

£73-£94

  • 750 m river swimming
  • 25 km road cycling
  • 5 km trail running
  • Sun 21 Sep 2025
  • #2 of 5
Promenade Park, Maldon

Standard Triathlon

12:10

Age 17 & over

£94-£115

  • 1500 m river swimming
  • 40 km road cycling
  • 10 km trail running
  • Sun 21 Sep 2025
  • #3 of 5
Promenade Park, Maldon

Standard Aquabike

12:10

Age 17 & over

£84

  • 1500 m river swimming
  • 40 km road cycling
  • Sun 21 Sep 2025
  • #5 of 5
Promenade Park, Maldon

Big East Middle Distance Aquabike

12:10

Age 18 & over

£135

  • 1500 m river swimming
  • 86 km road cycling